cases
A recovery line in Tai'an, Shandong retreats tailings from waterborne new-material production, in which platinum values are carried in spent crucible castable. After promising bench trials by the client with small-scale milling and tabling, Xinhai Mining designed the 50 kg/h line — built on the third floor of the client's existing workshop — and supplied the complete equipment package.
Line Design in an Existing Workshop: The 50 kg/h recovery line was designed onto the third floor of the operating building without structural changes, covering equipment foundations, operating platforms and piping for the grinding, screening, gravity separation and dewatering systems, with design completed between August and October 2022.
Feed and Grinding: Material is fed from the feed hopper through an electromagnetic vibrating feeder into one-stage open-circuit grinding, sized for the fine, uniform feed produced by the upstream process.
Gravity Separation: Ground pulp is pumped to a high-efficiency agitator for conditioning, then treated on shaking tables through roughing, scavenging and cleaning to recover the platinum-bearing concentrate.
Concentrate and Tailings Handling: Shaking-table concentrate is dewatered by natural settling in concentration ponds to yield the final product; final tailings are pumped to a filter press for dry stacking, and process water is settled, purified and pumped back to the line.
Installation was completed in early January 2023, and the line entered operation in April 2023, running intermittently at about 500 kg of feed per eight-hour shift in line with the 50 kg/h design rate. Client feedback on the recovery performance has been positive, and the recovered platinum-bearing concentrate is sold as the line's product.
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